NVMe Write speeds slow

Question

My Sk hynix Bc711 has encountered another problem. For the past few days, I have been noticing a major change in write speeds. I was copying GTA V from my another NVMe to the Bc711. But, the write speeds were very dissappointing. I thought it was the another drive. But when I ran Benchmark on the Bc711, 3200Mb/s read speed and 900Mb/s write speeds. Why does this happen? Please help.

Tesla1856 · Answer

Please upload a screenshot of your Crystal-Disk-Mark (for both NVMe SSDs if possible) Have you checked  Inspiron 3891 Dell support area for a SK-Hynix bc711 firmware-update ?

Tesla1856 · Answer

Do you have this firmware installed ?

One of the pages in the SK Hynix BC711 Control-Panel Device-Manager should show firmware-version.

https://www.dell.com/support/home/en-us/drivers/driversdetails?driverid=2ryry

You might want to backup first.

Obiymy · Answer

I am sorry, but I dont have a backup device. Plus I dont wanna reset my drive or something. Isnt there a proper legit way?

Plus the firmware version on that website matches the same in the Sk hynix drive manager

Obiymy · Answer

Hey there, Actually the other NVMe was a 970 Evo and I have gave it to my friend. I can send the screenshot of the Bc711.

Tesla1856 · Answer

@Obiymy wrote:

1. Actually the other NVMe was a 970 Evo and I have gave it to my friend.

2. I can send the screenshot of the Bc711.

1. You discovered the Samsung 970 Evo SSD was faster, and then gave it to your friend? Whatever you say buddy. So, I guess go buy another, and then you will have one again also.

2. SK-Hynix-Bc711 SSD shows Read:3388 / Write: 892 .

Read is fine. Write is a bit lower than your old measurement of 1600 (see old thread).

https://www.dell.com/community/Inspiron-Desktops/oem-NVMe-slow-speeds/m-p/8140733#M32459

Likely causes:

a. Last time, it was apparently a Windows-11 SSD software glitch. Maybe it is again.

b. It's just a little $30 Hynix SSD. Hynix is an entry-level SSD brand. Faster than HDD and SATA-SSD, but not as good as better brands like Samsung. You know this.

Tesla1856 · Answer

@Obiymy wrote:

1. I am sorry, but I dont have a backup device.

2. Plus I don't wanna reset my drive or something. Isnt there a proper legit way?

3. Plus the firmware version on that website matches the same in the Sk hynix drive manager

1. If you have anything important on computer, it should be backed-up. It doesn't normally erase anything. It was just a pre-caution.

If you do not, it doesn't matter if it gets erased anyway.

2. You can't get any more Legit than running Dell's official OEM-SSD firmware updater.

3. Then I guess you don't need to apply it.

I'm out of ideas. Maybe someone else can help you.

RoHe · Answer

@Obiymy Always include exact PC model and version of Windows in your posts.

If this is Win 11, there have been problems with poor SSD performance, and there's supposed to be another Win 11 update coming to fix this SSD problem (for the second time!), possibly in March...

Don't know if that will help with your SSD problem, even assuming you're running Win 11...

Obiymy · Answer

Mine is a Inspiron 3891. Win 11. I can wait till march as there is no emergency that I want to fix that problem

RoHe · Answer

No guarantee future Microsoft updates will fix your SSD performance issues, especially since the expected update will be their second attempt to fix this issue.

You might also try resetting BIOS.

Reboot and start tapping F2 when you see the Dell splash screen to open BIOS setup
Copy down all current BIOS settings, to be safe
Go to Exit screen and select option to reset BIOS to defaults
Confirm the change and exit setup. PC will automatically boot itself to desktop
Check SSD performance again

Obiymy · Answer

I did this atleast 2 times. No fix. Its a $30 Sk hynix NVMe, Probably no company wants to offer very good speeds at a $30 price range. Maybe Windows 10 can fix this issue?

RoHe · Answer

If this SSD is only 128 GB, that's very small. What's the SSD capacity and how much free space is available on it? If it's getting full, that will slow write speeds down.

Is BIOS set to RAID or AHCI? Don't change the setting...

Obiymy · Answer

Its a 256GB ssd and 150Gb free space. I dont know if my bios is set to raid or ahci

RoHe · Answer

Reboot and immediately start tapping F2 to open BIOS setup. Find the SATA Operation setting and see how it's set, but do not change it...

Obiymy · Answer

Sorry for replying late. It's set to RAID(Intel Rapid Storage Technology)

RoHe · Answer

You may want to change BIOS to AHCI, but no guaranty that will improve SSD speed.

You must make the change the right way, or PC won't be bootable:

At the desktop, open a CMD prompt window, run as administrator
Copy-paste this command, which will start Windows in Safe Mode the next time you reboot:
bcdedit /set {current} safeboot minimal and press Enter
Restart the computer and enter BIOS setup
Change SATA operation mode from RAID to AHCI
Do not change anything else
Save the change and exit Setup and Windows will automatically boot in Safe Mode
At the desktop, open a CMD prompt window again, as in step #1
Copy-paste this command, which will start Windows in Normal Mode the next time you reboot:
bcdedit /deletevalue {current} safeboot and press Enter
Reboot and Windows will automatically start with AHCI drivers enabled

Test SSD speeds again.

Inspiron Desktops

NVMe Write speeds slow

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